In a uniform magnetic field, the magnetic needle has a magnetic moment 9.85 \\times10^{-2} {A} \/ {m}^{2} and moment of inertia 5 \\times10^{-6} {kg} {m}^{2}. If it performs 10 complete oscillations in 5 seconds then themagnitude of the magnetic field is _______ {m} {T} [Take \\pi^{2} as 9.85] [27 Jul 2021 Shift 1]

JEE Main 27 July 2021 Shift 1 Solved Paper

Section: Physics

Question : 30 of 90

Marks: +1, -0

In a uniform magnetic field, the magnetic needle has a magnetic moment 9.85×10−2A∕m2 and moment of inertia 5×10−6kgm2. If it performs 10 complete oscillations in 5 seconds then themagnitude of the magnetic field is _______ mT
[Take π2 as 9.85]

[27 Jul 2021 Shift 1]

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